[llvm] [DAGCombiner] Turn `(neg (max x, (neg x)))` into `(min x, (neg x))` (PR #120666)

[Matt Arsenault via llvm-commits]

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@@ -1506,6 +1506,8 @@ inline bool isBitwiseLogicOp(unsigned Opcode) {
   return Opcode == ISD::AND || Opcode == ISD::OR || Opcode == ISD::XOR;
 }
 
+NodeType getInverseMinMaxOpcode(unsigned MinMaxOpc);
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arsenm wrote:

Document 

https://github.com/llvm/llvm-project/pull/120666